The addition of the PD-1 inhibitor durvalumab (Imfinzi) and the CTLA-4 inhibitor tremelimu­mab to best supportive care improved overall survival (OS) by >2 months compared with best supportive care alone in patients with advanced refractory colorectal cancer (CRC), according to results of the phase 2 Canadian Cancer Trials Group (CCTG) CO.26 clinical trial.

Tumor expression of PD-L1 has consistently predicted ­response and survival outcomes in non–small-cell lung cancer (NSCLC), whereas the role of PD-L1 in immune cells is unclear, said Edward B. Garon, MD, Director, Thoracic Oncology Program, David Geffen School of Medicine, University of California, Los Angeles, at the 2019 ASCO-SITC Clinical Immuno-Oncology Symposium.